add wear/wake hours to the staud output

Author: LukasAdamowicz

src/skdh/activity/core.py

@@ -944,6 +944,11 @@ def predict(self, *, time, accel, fs=None, wear=None, tz_name=None, **kwargs):
                     day_stop,
                 )
 
+                res['N wear wake hours'][iday] = around(
+                    sum(dwear_stops - dwear_starts) / fs / 3600, 1
+                )
+                res['Wear Wake Minutes'][iday] = sum(time[dwear_stops] - time[dwear_starts]) / 60
+
             self._compute_wear_wake_activity(
                 res,
                 accel,